James MacArthur, Danno 1.0, passes away at 72

James MacArthur, the last surviving original principal cast member of Hawaii Five-O, died today at age 72. He played the youthful sidekick, Dan Williams, to the Steve McGarrett of Jack Lord, the screen?s original Felix Leiter. MacArthur was 30 when the show began, though his Dan Williams probably is supposed to be in his mid-20s, based on references in early episodes.

The catchphrase of the original show, ?Book ?em, Danno,? has been replicated by the new Hawaii Five-0 (whose official spelling is a numeral 0 in place of the capital ?O? of the original). In the new version, Dan Williams 2.0 (Scott Caan) doesn?t find the phrase nearly as endearing. But such is the power of the catchphrase there was no way for the producer of the new version to ignore it. MacArthur, son of Helen Hayes and writer Charles MacArthur, got the gig after creator Leonard Freeman decided to recast the role after the pilot was filmed.

MacArthur, in the years after the show ended, was careful about what he said. At a 1996 fan convention in Los Angeles, he made self-depricating remarks but often declined to go into details even as one-time co-star Zulu, the original Kono (now turned into a... woman in the new series, courtesy of actress Grace Park) served up behind-the-scene anecdotes to fans that detailed tensions between some cast members.

In early Five-O episodes, Danno sometimes clashed with McGarrett, something that has been a staple of the new series. In this extended 1968 promo, check out the exchange that starts at the 3:54 mark. It?s from an episode called ?Samurai,? which was actually the first episode made after the pilot.